/**
 * Copyright (C) 2008 aileron.cc
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package cc.aileron.commons.instance;

import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Provider;
import com.google.inject.Singleton;

/**
 * 
 * InstanceFactory 実装
 * 
 * @author Aileron
 * 
 */
@Singleton
public class InstanceFactoryImpl implements InstanceFactory
{
    /*
     * (非 Javadoc)
     * 
     * @see cc.aileron.commons.instance.InstanceFactory#create(java.lang.Class)
     */
    public <T> T create(final Class<T> target)
    {
        return injector.getInstance(target);
    }

    /*
     * (非 Javadoc)
     * 
     * @see
     * cc.aileron.commons.instance.InstanceFactory#provider(java.lang.Class)
     */
    public <T> Provider<T> provider(final Class<T> target)
    {
        return new Provider<T>()
        {
            public T get()
            {
                return injector.getInstance(target);
            }
        };
    }

    /**
     * constractor injection
     * 
     * @param injector
     */
    @Inject
    public InstanceFactoryImpl(final Injector injector)
    {
        this.injector = injector;
    }

    /**
     * injector
     */
    final Injector injector;
}
